Please solve question 14

Please solve question 14 11. 12. 13. 14. Find all possible values off(: Solve Solve Solve 4 4 x 15. Solve 2 16. Solve

Dear student,
4-x+.5-7.2-x<422-x+.5-7×2-x<42-2x+1-7×2-x<42×2-x2-7×2-x<4let 2-x =t2t2-7t-4<02t2-8t+t-4<02t-4+1t-4<0t-42t+1<02t-4t+12<0-12<t<4we know t>0 0<t<40<2-x<4-2<x<0answer 
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